Nb/Boron-doped diamond electrodes: Preparation, electrochemical ozone production and failure behavior

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-20 DOI:10.1016/j.diamond.2025.112130

Xu Lin , Huiqiang Liu , Bing Wang , Wanlin Yang , Jian Wang , Wen Zhang , Wen Yuan , Jia Liu , Yifan Xu , Ying Xiong

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引用次数: 0

Abstract

Boron-doped diamond (BDD) is considered an excellent anode material for electrochemical ozone production (EOP) due to its high oxygen evolution potential, physical and chemical stability, and non-toxicity. However, the preparation of BDD films on substrates that exhibit both high ozone production efficiency and electrode stability remains a significant challenge. This study systematically investigates the effect of boron (B) concentration on ozone production performance, as well as the failure behavior of Nb/BDD electrode at optimal B concentration during the real EOP process. Firstly, BDD films with different B doping concentrations were prepared on Nb substrates by using the hot-filament chemical vapor deposition (HFCVD) technique. It was observed that the electrochemical active surface area (ECSA) and the EOP performance of the Nb/BDD electrodes increased with the rise of B doping concentrations, and the lowest energy consumption (0.09 Wh mg⁻¹) and the highest faraday efficiency (28.06 %) were achieved at B/C = 15,000 ppm. In addition, the failure behavior of the Nb/BDD electrode at 600 mA cm⁻² was characterized, revealing four distinct stages: i) electrochemical corrosion; ii) delamination and detachment of the BDD film; iii) oxidation and fragmentation of the exposed Nb substrate; iv) formation and fragmentation of Nb₂O₅ films on the BDD grains. This study provides a potential strategy to enhance the ozone yield and improve the stability of the Nb/BDD electrodes for practical EOP applications.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.